DooM eternal

doom eternal .... as the title says one of biggest wad around ....

from doomworld:

Eternal Doom remains famous for one thing: the massive, massive maps. The average map in Eternal Doom is about four times the size of the average stock Doom map, and takes much, much longer to complete. Actually this is the subject of many complaints about Eternal Doom. In some cases you have to hit a switch and then walk across the map again (which can take a good ten minutes) to get through the door the switch opened. These sorts of puzzles, coupled with the huge size of the maps both annoyed some and delighted others. Either way you can't deny that all the maps in Eternal Doom are quality, and if nothing else the massive size of the level data (which is the largest collection of level data to date) is impressive enough to warrent a spot here.

how to play :

google for doom2.wad and download and copy it into gzdoom main folder

then download gzdoom here:

 gzdoom

then drag eternal.wad into gzdoom executable and select doom2 hell on the earth

download